Zabbix Frontend Authentication Bypass Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 22/02/2022. Patch affected systems as an emergency.
| Package | Affected versions | Patched versions |
|---|---|---|
| zabbix | = 6.0.0≥ 5.4.0, ≤ 5.4.8 |
In the case of instances where the SAML SSO authentication is enabled (non-default), session data can be modified by a malicious actor, because a user login stored in the session was not verified. Malicious unauthenticated actor may exploit this issue to escalate privileges and gain admin access to Zabbix Frontend. To perform the attack, SAML authentication is required to be enabled and the actor has to know the username of Zabbix user (or use the guest account, which is disabled by default).
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